"Parker square" meaning in All languages combined

{
  "forms": [
    {
      "form": "Parker squares",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Parker square (plural Parker squares)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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      "examples": [
        {
          "ref": "2004, Mathematical Reviews, page 8484",
          "text": "The use of Parker squares in the construction of sets of mutually orthogonal Latin squares is then examined.",
          "type": "quotation"
        },
        {
          "ref": "2004, Ian M. Wanless, “Diagonally cyclic latin squares”, in European Journal of Combinatorics, volume 25, number 3",
          "text": "A main class will contain a certain type of Parker square if and only if each square in the class is isotopic to a Parker square of that type.",
          "type": "quotation"
        },
        {
          "ref": "2015, A. Donald Keedwell, József Dénes, Latin Squares and their Applications, page 287",
          "text": "Thus, Parker squares of different types may lie in the same isomorphism class and, a fortiori, in the same isotopism or main class of latin squares.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A radially symmetric Latin square."
      ],
      "id": "en-Parker_square-en-noun-Sa6nx8AG",
      "links": [
        [
          "radially",
          "radially"
        ],
        [
          "symmetric",
          "symmetric"
        ],
        [
          "Latin square",
          "Latin square"
        ]
      ]
    }
  ],
  "word": "Parker square"
}

{
  "forms": [
    {
      "form": "Parker squares",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      "expansion": "Parker square (plural Parker squares)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        "English countable nouns",
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      "examples": [
        {
          "ref": "2004, Mathematical Reviews, page 8484",
          "text": "The use of Parker squares in the construction of sets of mutually orthogonal Latin squares is then examined.",
          "type": "quotation"
        },
        {
          "ref": "2004, Ian M. Wanless, “Diagonally cyclic latin squares”, in European Journal of Combinatorics, volume 25, number 3",
          "text": "A main class will contain a certain type of Parker square if and only if each square in the class is isotopic to a Parker square of that type.",
          "type": "quotation"
        },
        {
          "ref": "2015, A. Donald Keedwell, József Dénes, Latin Squares and their Applications, page 287",
          "text": "Thus, Parker squares of different types may lie in the same isomorphism class and, a fortiori, in the same isotopism or main class of latin squares.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A radially symmetric Latin square."
      ],
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        [
          "radially",
          "radially"
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          "symmetric",
          "symmetric"
        ],
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  "word": "Parker square"
}